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A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states

The extension of the available stress-based predictive models from uniaxial to multiaxial feature is uncertain due to the difficulty to justify the model transferability to the cases which involves complex deformation and fracture mechanisms. This paper presents a new approach to predict the creep r...

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Main Authors: Nasrul Azuan, Alang, Nikbin, Kamran M.
Format: Article
Language:English
Published: Elsevier Ltd 2019
Subjects:
T Technology (General)
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
Online Access:http://umpir.ump.edu.my/id/eprint/26355/1/A%20new%20approach%20to%20predict%20creep%20rupture%20of%20Grade%2092%20.pdf
http://umpir.ump.edu.my/id/eprint/26355/
https://doi.org/10.1016/j.ijmecsci.2019.105096
https://doi.org/10.1016/j.ijmecsci.2019.105096
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spelling my.ump.umpir.263552019-12-09T03:31:54Z http://umpir.ump.edu.my/id/eprint/26355/ A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states Nasrul Azuan, Alang Nikbin, Kamran M. T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery The extension of the available stress-based predictive models from uniaxial to multiaxial feature is uncertain due to the difficulty to justify the model transferability to the cases which involves complex deformation and fracture mechanisms. This paper presents a new approach to predict the creep rupture life of Grade 92 steel under multiaxial stress state as the case of notched bar samples using Kachanov's Continuum Damage Mechanics (CDM) model. Combining the CDM model with the concept of Hayhurst's representative stress and accounting two extreme conditions; fully dislocation-controlled and diffusion-controlled creep mechanisms provide the bounds for short- and long-term rupture data of notched bar up to 10,000 h. Although the CDM is scientifically relevant and fundamental in their approach, it is generally complex and contains too many variables. Therefore, it needs proper measurements or numerically intensive to make the model acceptable for industrial applications. Alternatively, the recent developed strain-based exponential-type predictive model which links globally uniform failure strain with a multiaxial constraint factor was employed with the intention to reduce the large number of CDM parameters. The approach is relatively simple yet reliable to be used for high temperature creep rupture assessment. Elsevier Ltd 2019-08-23 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/26355/1/A%20new%20approach%20to%20predict%20creep%20rupture%20of%20Grade%2092%20.pdf Nasrul Azuan, Alang and Nikbin, Kamran M. (2019) A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states. International Journal of Mechanical Sciences, 163. pp. 1-2. ISSN 0020-7403 https://doi.org/10.1016/j.ijmecsci.2019.105096 https://doi.org/10.1016/j.ijmecsci.2019.105096
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic T Technology (General)
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
spellingShingle T Technology (General)
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
Nasrul Azuan, Alang
Nikbin, Kamran M.
A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states
description The extension of the available stress-based predictive models from uniaxial to multiaxial feature is uncertain due to the difficulty to justify the model transferability to the cases which involves complex deformation and fracture mechanisms. This paper presents a new approach to predict the creep rupture life of Grade 92 steel under multiaxial stress state as the case of notched bar samples using Kachanov's Continuum Damage Mechanics (CDM) model. Combining the CDM model with the concept of Hayhurst's representative stress and accounting two extreme conditions; fully dislocation-controlled and diffusion-controlled creep mechanisms provide the bounds for short- and long-term rupture data of notched bar up to 10,000 h. Although the CDM is scientifically relevant and fundamental in their approach, it is generally complex and contains too many variables. Therefore, it needs proper measurements or numerically intensive to make the model acceptable for industrial applications. Alternatively, the recent developed strain-based exponential-type predictive model which links globally uniform failure strain with a multiaxial constraint factor was employed with the intention to reduce the large number of CDM parameters. The approach is relatively simple yet reliable to be used for high temperature creep rupture assessment.
format Article
author Nasrul Azuan, Alang
Nikbin, Kamran M.
author_facet Nasrul Azuan, Alang
Nikbin, Kamran M.
author_sort Nasrul Azuan, Alang
title A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states
title_short A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states
title_full A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states
title_fullStr A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states
title_full_unstemmed A new approach to predict creep rupture of Grade 92 steel under multiaxial stress states
title_sort new approach to predict creep rupture of grade 92 steel under multiaxial stress states
publisher Elsevier Ltd
publishDate 2019
url http://umpir.ump.edu.my/id/eprint/26355/1/A%20new%20approach%20to%20predict%20creep%20rupture%20of%20Grade%2092%20.pdf
http://umpir.ump.edu.my/id/eprint/26355/
https://doi.org/10.1016/j.ijmecsci.2019.105096
https://doi.org/10.1016/j.ijmecsci.2019.105096
_version_ 1654960235155030016
score 13.211869

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